CompTIA Network+

Router

What kind of device is this?

Layer 2 switch

What kind of device is this?

Layer 3 switch or multilayer switch

What kind of device is this?

Layer 6, the Presentation Layer

What layer of the OSI model is responsible or encryption between two hosts?

Layer 7, the Application Layer

What layer of the OSI model is most reliant on other layers for packet delivery?

Class D

What class of IP address is used for multicast delivery?

224-239.x.x.x

What is the range of values for the first octet of class D IP addresses?

Class D

What class of address should be used for sending AV broadcasts to an organization-wide video event?

Layer 1, the Physical Layer

What layer of the OSI model do hubs, modems, and SFPs operate on?

Access, Distribution, Core

What are the three names for the three layers of the three-tier hierarchical model?

Mesh

What is the name for this topology?

show mac address-table  

What switch command will display the pairing of MAC addresses to local interfaces and VLANs?

Star, Hub and Spoke

What are two names for this type of topology?

show ip arp

What Cisco command will display the pairing of MAC addresses to IP addresses?

ipconfig

What command on a Windows host will display the IP address, subnet mask and default gateway?

arp -a

What command will display the MAC addresses a Windows host has communicated with, along with their associated IP address?

port 587 (TCP)

What is the port for sending secure email?

22 (TCP)

What is the port for SSH?

switch (L2 or L3)

Which networking device would allow the configuration of MTU?

Polarity (where the A and B or Tx and Rx are reversed)

What is a possible cause of a fiber optic link not operating successfully assuming the correct standards, SFPs are used and there is continuity and signal strength along the fiber run?

Frame tagging is used for the voice VLAN (but not the data VLAN). The Voice VLAN used 802.1q tagging, while the data VLAN is untagged.

How does a switch control traffic sent to a IP phone differently than traffic sent to a standard workstation using the IP phone to connect to the data network?

port security

What security feature is well suited in preventing the MAC address table on a switch from being overwhelmed via MAC flooding?

Port security (using MAC addresses), 802.1x authentication

What are two ways to allow/disallow stations connecting to a LAN (i.e. NAC)?

802.1q Trunking

What technology allows multiple networks to pass on a single link between switches?

Incorrect Voice VLAN assignment, Power over Ethernet (PoE) budget is exceeded

What are two common issues that might make an IP phone not operate correctly?

VLAN hopping

A hacker is trying to bypass security measures by using 802.1q double-tagging. What kind of attack is this?

Toner

What tool would you use to identify which cable run from a patch panel goes to a specific office?

Exposed wires, Copper tape (it is not usual to use copper tape to shield the termination of CAT8 cables)

What are two things to look for in a CAT8 cable run that is experiencing frame drops due to noise?

32678

What is the default STP priority?

LC

What fiber optic connection would be likely found on a NIC?

MMF

What kind of fiber optic connection bounces light with cladding?

STP

What is the protocol used to failover between L2 switches when redundancy exists in a switched environment?

Rollover

What kind of cable is this?

Crossover

What kind of cable is this?

Straight through

What kind of cable is this?

Open

What would a cable tester show as the fault for this cable?

Reversed

What would a cable tester show as the fault for this cable?

Split

What would a cable tester show as the fault for this cable?

Short

What would a cable tester show as the fault for this cable?

Switch to Switch

When/where are you most likely to use a crossover cable?

Out of band management to a network device's console port

What is a rollover cable used for?

20Mhz

What is the width of a wifi channel?

Heat Map

What is the schematic that displays the RSSI of Wi-Fi against your floorplan?

2.4Ghz

What frequency range is most impacted by microwave ovens?

Mesh 

What is the name of the Wi-Fi topology if you are daisy-chaining (wirelessly) wireless access points to extend coverage over a large area?

Captive Portal

How is an acceptable use policy (AUP) presented to users in a guest WLAN?

ESSID

What is the name of the SSID when roaming is supported between APs?

show mac-address table dynamic

You have learned the layer 2 address or a host, and now need to determine the port it connects to on a switch. What command would be appropriate?

The switch with the lowest bridge ID (BID)

Which switch would become the root bridge for the STP instance for a VLAN?

enable port security

You want to ensure that a rouge employee can’t cause a successful MAC address flooding attack. What should you do?

The power budget for PoE has been exceeded

One of your Access Points keeps rebooting. What is the most likely reason for this?

Toner and probe

You have inherited a UTP cabling nightmare from your predecessor. What is the best tool to use to determine which cable goes to which wall port?